▎ 摘　　要

NOVELTY - Preparing electric conductive nano-particles composite film comprises e.g. adding graphene oxide and polyvinylpyrrolidone to deionized water, performing ultrasonic stirring by passing nitrogen gas, adding iron(II) chloride tetrahydrate and iron(III) chloride hexahydrate dropwise, stirring, concentrating, mixing polyvinyl alcohol solution with reduced graphene oxide-iron oxide solution, performing ultrasonic agitation, pouring polyvinyl alcohol/reduced graphene oxide-iron oxide solution mixed solution to a polystyrene dish and placing above polystyrene dish on stand having rectangular magnets. USE - The method is useful for preparing electric conductive nano-particles composite film (claimed). ADVANTAGE - The method is environmental friendly. DETAILED DESCRIPTION - Preparing electric conductive nano-particles composite film comprises (i) adding graphene oxide and polyvinylpyrrolidone to deionized water, carrying out ultrasonic stirring, passing nitrogen gas, then adding iron(II) chloride tetrahydrate and iron(III) chloride hexahydrate dropwise, adding aqueous ammonia solution having pH of 11, stirring reaction at a high speed, increasing temperature to 70 degrees C, curing for 1 hour, stopping passing nitrogen gas, adding hydrazine hydrate dropwise, carrying out high speed stirring at 98 degrees C for 2 hours, washing with deionized and concentrating to 0.25 mg/ml reduced graphene oxide (RGO)-iron oxide solution; and (ii) mixing polyvinyl alcohol solution with RGO-iron oxide solution, carrying out uniform ultrasonic agitation, to obtain polyvinyl alcohol/reduced graphene oxide-iron oxide solution mixed solution, pouring polyvinyl alcohol/reduced graphene oxide-iron oxide solution mixed solution into a polystyrene dish, placing the above polystyrene dish on a stand having rectangular magnets at 30-35 degrees C for 12 hours, and drying at room temperature, to obtain the final product.